Merge in the new GIL.

Author: pitrou

Include/ceval.h

@@ -112,10 +112,6 @@ PyAPI_FUNC(PyObject *) PyEval_GetCallStats(PyObject *);
 PyAPI_FUNC(PyObject *) PyEval_EvalFrame(struct _frame *);
 PyAPI_FUNC(PyObject *) PyEval_EvalFrameEx(struct _frame *f, int exc);
 
-/* this used to be handled on a per-thread basis - now just two globals */
-PyAPI_DATA(volatile int) _Py_Ticker;
-PyAPI_DATA(int) _Py_CheckInterval;
-
 /* Interface for threads.
 
    A module that plans to do a blocking system call (or something else
@@ -174,6 +170,9 @@ PyAPI_FUNC(void) PyEval_AcquireThread(PyThreadState *tstate);
 PyAPI_FUNC(void) PyEval_ReleaseThread(PyThreadState *tstate);
 PyAPI_FUNC(void) PyEval_ReInitThreads(void);
 
+PyAPI_FUNC(void) _PyEval_SetSwitchInterval(unsigned long microseconds);
+PyAPI_FUNC(unsigned long) _PyEval_GetSwitchInterval(void);
+
 #define Py_BEGIN_ALLOW_THREADS { \
 			PyThreadState *_save; \
 			_save = PyEval_SaveThread();
@@ -192,6 +191,7 @@ PyAPI_FUNC(void) PyEval_ReInitThreads(void);
 #endif /* !WITH_THREAD */
 
 PyAPI_FUNC(int) _PyEval_SliceIndex(PyObject *, Py_ssize_t *);
+PyAPI_FUNC(void) _PyEval_SignalAsyncExc(void);
 
 
 #ifdef __cplusplus

Include/pystate.h

@@ -88,6 +88,8 @@ typedef struct _ts {
 
     PyObject *dict;  /* Stores per-thread state */
 
+    /* XXX doesn't mean anything anymore (the comment below is obsolete)
+       => deprecate or remove? */
     /* tick_counter is incremented whenever the check_interval ticker
      * reaches zero. The purpose is to give a useful measure of the number
      * of interpreted bytecode instructions in a given thread.  This

Include/sysmodule.h

@@ -18,7 +18,6 @@ PyAPI_FUNC(void) PySys_WriteStderr(const char *format, ...)
 			Py_GCC_ATTRIBUTE((format(printf, 1, 2)));
 
 PyAPI_DATA(PyObject *) _PySys_TraceFunc, *_PySys_ProfileFunc;
-PyAPI_DATA(int) _PySys_CheckInterval;
 
 PyAPI_FUNC(void) PySys_ResetWarnOptions(void);
 PyAPI_FUNC(void) PySys_AddWarnOption(const wchar_t *);

Lib/test/test_sys.py

@@ -154,6 +154,21 @@ def test_setcheckinterval(self):
             sys.setcheckinterval(n)
             self.assertEquals(sys.getcheckinterval(), n)
 
+    def test_switchinterval(self):
+        self.assertRaises(TypeError, sys.setswitchinterval)
+        self.assertRaises(TypeError, sys.setswitchinterval, "a")
+        self.assertRaises(ValueError, sys.setswitchinterval, -1.0)
+        self.assertRaises(ValueError, sys.setswitchinterval, 0.0)
+        orig = sys.getswitchinterval()
+        # sanity check
+        self.assertTrue(orig < 0.5, orig)
+        try:
+            for n in 0.00001, 0.05, 3.0, orig:
+                sys.setswitchinterval(n)
+                self.assertAlmostEquals(sys.getswitchinterval(), n)
+        finally:
+            sys.setswitchinterval(orig)
+
     def test_recursionlimit(self):
         self.assertRaises(TypeError, sys.getrecursionlimit, 42)
         oldlimit = sys.getrecursionlimit()

Makefile.pre.in

@@ -596,7 +596,7 @@ Objects/unicodeobject.o: $(srcdir)/Objects/unicodeobject.c \
 $(OPCODETARGETS_H): $(OPCODETARGETGEN_FILES)
 	$(OPCODETARGETGEN) $(OPCODETARGETS_H)
 
-Python/ceval.o: $(OPCODETARGETS_H)
+Python/ceval.o: $(OPCODETARGETS_H) Python/ceval_gil.h
 
 Python/formatter_unicode.o: $(srcdir)/Python/formatter_unicode.c \
 				$(BYTESTR_DEPS) \

Objects/longobject.c

@@ -96,10 +96,7 @@ maybe_small_long(PyLongObject *v)
 #define MIN(x, y) ((x) > (y) ? (y) : (x))
 
 #define SIGCHECK(PyTryBlock) \
-	if (--_Py_Ticker < 0) { \
-		_Py_Ticker = _Py_CheckInterval; \
-		if (PyErr_CheckSignals()) PyTryBlock \
-	}
+	if (PyErr_CheckSignals()) PyTryBlock \
 
 /* forward declaration */
 static int bits_in_digit(digit d);